Physical and chemical properties of Iodine

Atomic Number:53
Element Symbol:I
Element Name:Iodine
Atomic Weight:126.90447
Group Number:17
Group Name:Halogen
Period Number:5
Ground State Configuration:[Kr] 4d10 5s2 5p5
Ground State Level:2Po3/2
Standard State:Solid
Common Valences:1,3,5,7
Bond Length:266.6
Atomic Radius Empirical:140
Atomic Radius Calculated:115
Covalent Radius Empirical:133
Vander Waals Radius:198
Electron Affinity:295.2
First Ionization Energy:1008.4
Pauling Electronegativity:2.66
Sanderson Electronegativity:2.78
Allred Rochow Electronegativity:2.21
Mulliken Jaffe Electronegativity:2.74
Allen Electronegativity:2.359
Density Of Solid:4940
Molar Volume:25.72
Bulk Modulus:7.7
Electrical Resistivity:> 10**15
Melting Point:113.7
Boiling Point:184.3
Critical Temperature:546
Thermal Conductivity:0.449
Enthalpy Of Fusion:7.76 (per mol I atoms)
Enthalpy Of Vaporization:20.9 (per mole I atoms)
Enthalpy Of Atmization:107
Most Common Oxidation Numbers:7,5,3,1,-1
Color:Violet-dark grey, lustrous
Discovered By:Bernard Courtois
Discovered At:France
Discovered When:1811
Origin Of Name:From the Greek word iodes meaning violet

Calculate the molecular weight of Iodine or molecular weight I.

Also see the full list of chemical elements and atomic weights.

Compounds that contain Iodine